I read about the mirror effect in the RTZ (or at least things not exactly where they are in the real world), so I'm wondering, was I seeing in the RTZ? Did I actually project and experience the mind split? Or was that astral sight? If I did project, I didn't experience reintegration. Also, why did the image keep drifting downward?
I'd say you experienced the expansion of a partial exit, causing the 'bilocation with wonderland effect' thrown in. There was no reintegration because there was no dislocation, you were still 'in there' -mostly.

Nice work, you are already ahead of the curve.